216203416865377 has 2 divisors, whose sum is σ = 216203416865378. Its totient is φ = 216203416865376.

The previous prime is 216203416865369. The next prime is 216203416865399. The reversal of 216203416865377 is 773568614302612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118848174866001 + 97355241999376 = 10901751^2 + 9866876^2 .

It is a cyclic number.

It is not a de Polignac number, because 216203416865377 - 2³ = 216203416865369 is a prime.

It is not a weakly prime, because it can be changed into another prime (216203416865357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108101708432688 + 108101708432689.

It is an arithmetic number, because the mean of its divisors is an integer number (108101708432689).

Almost surely, 2^{216203416865377} is an apocalyptic number.

It is an amenable number.

216203416865377 is a deficient number, since it is larger than the sum of its proper divisors (1).

216203416865377 is an equidigital number, since it uses as much as digits as its factorization.

216203416865377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 61.

The spelling of 216203416865377 in words is "two hundred sixteen trillion, two hundred three billion, four hundred sixteen million, eight hundred sixty-five thousand, three hundred seventy-seven".